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Sheet-like light source device

a light source device and sheet-like technology, applied in the direction of instruments, lighting and heating apparatus, optical elements, etc., can solve the problems of unsuitable mass production, waste of manufacturing time, and non-uniform luminance distribution of light on the liquid crystal panel, so as to achieve significant reduction avoid the effect of light concentration at the corners

Active Publication Date: 2006-10-24
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Significantly reduces light concentration at corners, improving luminance uniformity and manufacturing efficiency by preventing light from being reflected back to the module, thus enhancing the overall performance of the sheet-like light source device.

Problems solved by technology

Accordingly, the angle of the light passing through the liquid crystal is altered, resulting in a non-uniform luminance distribution of light on the liquid crystal panel.
The change illustrated above in fact wastes time in manufacturing process and is not suitable for mass production.
Even so, the black tape is easy to fall off, thereby impairing the engineering reliability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0031]Referring to FIG. 5, the light-guiding mechanisms are slots 4210 disposed on the frame (or the retention member) 42, the slots 4210 being open along the frame (or the retention member) 42. When light scattered from the reflecting plate, for instance, from the left side, reaches a position of the concave portion 421 or the frame (or the retention member) 42, the light will be dispersed along the slots 4210 without being again reflected back to the reflecting plate. Thus, the light concentration at the convex portion of the reflecting plate can be reduced.

embodiment 2

[0032]Referring to FIG. 6, the light-guiding mechanisms are slots 4211 disposed at a position near the concave portion 421 of the frame (or the retention member), the position of the slots 4211 being selected for facilitating light to be easily reflected to the reflecting plate and open in the frame (or the retention member) 42 to be perpendicular or non-perpendicular to the frame (or the retention member). When light scattered from the reflecting plate, for instance, from the left side, reaches a position of the concave portion 421 or the frame (or the retention member) 42, the light will be dispersed along the slots 4211 without being again reflected back to the reflecting plate.

embodiment 3

[0033]Referring to FIG. 7, the light-guiding mechanisms are mounted not only on the frame (or the retention member) of the sheet-like light source device but also on an outer support 43 for holding the frame (or the retention member) 42 in this embodiment. The upper part of FIG. 7 as divided with dotted lines is a cross-sectional view of the light-guiding mechanisms disposed in the frame (or the retention member) while the lower part of FIG. 7 as divided with dotted lines is a top view of the light-guiding mechanisms.

[0034]The light-guiding mechanisms are slots 4212 disposed at a position near the concave portion 421 of the frame (or the retention member), the position of the slots 4212 being selected for facilitating light to be easily reflected back to the reflecting plate and open in the frame (or the retention member) 42 in a penetrated manner to be perpendicular or non-perpendicular to the frame (or the retention member). When light scattered from the reflecting plate, for inst...

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PUM

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Abstract

The present invention relates to a sheet-like light source device, including a light-conducting plate having at least one convex portion disposed on the lateral portion thereof; at least one light-source unit disposed on one side of the light-conducting plate, which includes a light source and a reflecting sheet; and a housing having a chassis and at least one frame; in which the frame is mounted on the edges of the chassis, and a concave portion corresponding to the convex portion of the light-conducting plate to hold the convex portion and a plurality of light-guiding mechanisms are formed on the frame. The present invention further has a housing for a sheet-like light source device, including a chassis and a frame mounted on the edges of the chassis, in which a concave portion and a plurality of light-guiding mechanisms are formed on the frame.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a sheet-like light source device; in particular, a sheet-like light source device for liquid crystal display devices.[0003]2. Description of Related Art[0004]In recent years, the flat panel display industry has rapidly developed. To improve the performance of the displays, the industry has devoted significant efforts to improve and design the structure of the respective components of the display devices, among which the sheet-like light source device of the liquid crystal displays has been improved to provide a light source with a highly uniform luminance distribution of light.[0005]Because the liquid crystal itself is not luminous, it is necessary to add a backlight source (generally, a fluorescent tube) to the rear of a liquid crystal display panel to project light through the display panel. To this end, the light emitting from the light source passes through a polarizer and the liquid...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G03B15/02F21V13/00
CPCG02B6/0088G02F1/133615G02F2201/503G02F1/1335H01J9/24H01J61/30
Inventor HUANG, TZU-FONGCHU, CHUN-CHIEH
Owner AU OPTRONICS CORP